package com.hp.gxw.shiro;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.pam.ModularRealmAuthenticator;
import org.apache.shiro.realm.Realm;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

public class UserModularRealmAuthenticator extends ModularRealmAuthenticator {
	@Override
	protected AuthenticationInfo doAuthenticate(AuthenticationToken authenticationToken)
			throws AuthenticationException {
		// 判断getRealms()是否返回为空
		assertRealmsConfigured();
		// 强制转换回自定义的CustomizedToken
		UserToken userToken = (UserToken) authenticationToken;
		// 登录类型
		String loginType = userToken.getLoginType();
		// 所有Realm
		Collection<Realm> realms = getRealms();
		// 登录类型对应的所有Realm
		List<Realm> typeRealms = new ArrayList<>();
		for (Realm realm : realms) {
			if (realm.getName().contains(loginType)) {
				typeRealms.add(realm);
			}
		}
		// 判断是单Realm还是多Realm
		if (typeRealms.size() == 1) {
			return doSingleRealmAuthentication(typeRealms.get(0), userToken);
		} else {
			return doMultiRealmAuthentication(typeRealms, userToken);
		}
	}
}